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<title>Problem 1300. -- [LLH邀请赛]大数计算器 -- 衡阳八中OJ离线版-2012-02-29</title><center><h2>1300: [LLH邀请赛]大数计算器</h2><span class=green>Time Limit: </span>10 Sec&nbsp;&nbsp;<span class=green>Memory Limit: </span>162 MB<br><span class=green>Submit: </span>79&nbsp;&nbsp;<span class=green>Solved: </span>35<br>[<a href='submitpage.php?id=1300'>Submit</a>][<a href='problemstatus.php?id=1300'>Status</a>][<a href='bbs.php?id=1300'>Discuss</a>]</center><h2>Description</h2><div class=content>TBL试图用计算器求C(N,M)，可是失败了。还是你来帮他编写一个大数计算器吧。 因为答案可能很大
TBL看了会晕，所以如果答案超过12位，就以“XXX…XXXXXXXXX”的格式输出。 </div><h2>Input</h2><div class=content> 两个非负整数N、M。</div><h2>Output</h2><div class=content>一个整数表示C(N,M)。（可能包含“…”）</div><h2>Sample Input</h2>
			<div class=content><span class=sampledata>10%的分数，答案不超过int64。<br />
30%的分数，N<=1,000。<br />
50%的分数，N<=30,000。<br />
100%的分数，N<=1,000,000，0<=M<=N。</span></div><h2>Sample Output</h2>
			<div class=content><span class=sampledata>输入样例1<br />
10 5<br />
输入样例2 <br />
100 50<br />
<br />
</span></div><h2>HINT</h2>
			<div class=content><p>输出样例1<br />
252 <br />
输出样例2<br />
100...812497256</p></div><h2>Source</h2>
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